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Revealing Gravity Waves
Severe weather -- like thunderstorms, tornadoes, and hurricanes -- can push air upward into a higher layer of the atmosphere and trigger gravity waves. Aboard the International Space Station (ISS), the Atmospheric Waves Experiment (AWE) instrument captures these waves by looking for variations in the brightness of Earth's airglow. (Video credits: NASA Goddard and Utah State University) Read the full article
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"Colors of the Night - Iceland" (a winter night). Photo © Louis Leroux. AstroBin image of the day 6 June '25. Part of the image includes Airglow. Photographer's description: "The second striking phenomenon, covering the entire sky, is airglow. These colorful bands stretching across the sky result from complex chemical reactions occurring in the upper atmosphere, specifically in the thermosphere, which is a layer within the ionosphere. Caused by solar radiation, powerful ultraviolet rays dissociate certain molecules in Earth's atmosphere. These excited molecules then emit a faint glow in the dark night, a phenomenon known as chemiluminescence. The red color comes from hydroxyl molecules. Sodium and oxygen atoms rise to about 100 km in altitude and produce green or even orange light. Blue airglow is much rarer and occurs even higher up. A recent study has confirmed a link between this phenomenon and gravity waves."
Ripples from the Big Bang ?
It was Albert Einstein who first postulated the idea of gravitational waves, and in the 1960s Joseph Weber at the University of Maryland started to think about how he could build a device that could detect them.
The first devices were built in the 1970's, although limited and not sensitive enough to be able to see the real waves through the noise, and even that was postulated that if you could record the noise around it, you could then cancel it out leaving only the actual gravitational waves.
Push forward to the late 1990s and LIGO's new detector, which continued it's search for detecting such waves right through to 2015, before finally making a breakthrough.
It was on September 14, 2015 that finally, almost 100 years after Einstein first postulated their existence, did LIGO finally get a positive gravitational wave detection.
The device has continued to improve and now is a valuable tool for recording events often just before we see them. One such event came from the direction of Betelgeuse just around the time of the great dimming, exciting scientists into the possibility of a supernova, which of course never came, and it's assumed the detection came from far beyond Betelgeuse, and was just a coincidence.
At best, LIGO is great for picking up really huge gravitational disturbances, such as the waves from closely orbiting black holes or neutron star collisions, these are mostly short blips, but recent detections have picked up a much larger and longer wave, a very low frequency hum, was this the wave from the big bang itself ?
Scientists suspect rather, it's the merger of supermassive black holes, billions of times the mass of our Sun, churning up space/time and sending out huge light year long waves that take months to detect as they pass through.
While it may not specifically have been the big bang, the detection of huge long frequency waves takes LIGO a step closer to maybe one day detecting such waves, evidence of cosmic inflation and may go some way to answer fundamental questions about how long inflation will continue, if there will be a big crunch for example.
Currently watching This Video Essay From acollierastro
and Did You Know that we designed an array of radio telescopes called The Event Horizon Telescope which 1)can take pictures of blackholes and 2)is the size of THE EARTH?!?!
cuz that's pretty fuckin sweet owo
Science is So Cool :3 :3
y'all should listen to gravity waves by slider on spotify
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David Spriggs, Gravity Series, 2019 (Acrylic on layered plexiglass in LED lit plexiglass display case)
Hershal the Roboid (ep 2) Explores his gravitational wave detection unit Our ever so creative Bill Schneider is an inventor, meet Hershal the Roboid #robot #animation #electronics for fun #robotics #electronics #spare parts #hershal #roboid #billschneider #dead sullivan show #Youtube robot, animation, electronics, for fun, robotics, electronics, spare parts, hershal roboid, bill schneider, dead sullivan show, Youtube, episode 2, gravity, wave detection, inventor, robot, talking, science, anamtronics, not disney, homemade, watch tv,Â
We’d captured the uncapturable. The motion of waves on the cosmic ocean.
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